Trolley



M. G. WILSON.

TRQLLEY.

APPLICATION FILED MR. 1. 1921.

Patented Sept. 12, 1922.

avwe/vwbz MEL l/EN 6. 01/4 501v I; w \\mw W m o, 2 M 5 w 9 l 2 2 1 1 'To allwhom it may concern I Be it known that I, MELVEN "a citizen of the United States, and a resi- Patented Sept. 12, 1922.

UNITED STATES MELVEN G. WILSON, OF SEATTLE, WASHINGTON, ASSIGNOR OF ONE-HALF TO VICTOR J. THURLOW, 0F SEATTLE, WASHINGTON.

TROLLEY.

Application filed March 7, 1921. Serial No. 450,114.-

Gr. WILSON,

ing,

dent of the city of Seattle, county of State of WVashington, have invented certain new and useful. Improvements in Trolleys,

of which 'the'following is a specification.

This invention relates to trolleys, and more I particularly to what may be termed stepping trolleys of =thatcharacter adapted for transporting suspended loads along overhead cables or rails;

In the logging industry it is especially desirable in some cases to transport logs along overhead cables, but with trolleys ortackles of the type commonly used, it is impossible'to provide or use supports or guys forthe cables becausesuch would interfere with the travel of the trolley. In mining it is often desirable to employ-the overhead cable or' rail method of transporting ore,v and 1n some cases one sided trolleys have been provided for travel along supported cables, but such trolleys have proven unsafe as they are apt to leave the cable.

It is therefore the object of this invention to overcome these previous difliculties by the provision of a trolley that will be absolutely safe and efficient in its operation in that it will not be possible for it to leave the cable or rail whereon it travels, and, which is of such construction that it can pass cross bars, or guys supporting the cable without interfering therewith. I

Other objects of the invention reside in the manner of constructing the various parts of the device and their combination and operation.

In accomplishing the objects of the invention, I have provided the improved details of construction, the preferred forms of which are illustrated in the accompanying drawings, wherein- Figure 1 is a side view of a stepping trolley constructed according to the present invention and mounted for travel along a cable supported at intervals by cross bars.

Figure 2 is a transverse. verticalhsection taken on the line 2-2 in Figure 1.

Figure 3 is a side elevation of an alternative construction employing one suspending hook and stepping wheel,

Figure/1 is an enlarged detail section showing the character ofsheave rollersused for suspending the stepping wheels.

Referring more in detail to the several views of the drawings, wherein like reference numerals designate the, same or like -p arts 1 designates what may be an overhead cable or rail which is supportedat intervals necessary according to-its use, by horizontal cross bars 2, which, as shown in Figure 2, may be mounted upon suitable frame structures 3 at their opposite ends. In some cases it may be preferredto use suspending cables in place of the cross bars, but in this case the operation of the trolley would be the same.

structure formed of two parallel, spaced apart side rails 5 and5, provided adjacent their opposite endswith upwardly extending portions 6 between which are extended bolts 7 upon which sheave, or trolley wheels 8 and 8 are mounted in such manner as to follow along the cable 1. The rails 5 and 5' are rigidly joined at their ends by bolts 9, and also between the wheels by a plurality of bolts, as at 10, so that the frame is perfectly rigid.

Formed at the opposite ends of the rails 5 and 5 are arcuate, inwardly opening guideways or channels 12, as shown in Figure 2. These are formed about centers which would be perpendicularly below the axes of the wheels 88', and which extend approximately forty five degrees each side of a plane vertically through said axles.

15 designates the suspending or stepping wheels. These are arranged in pairs at opposite ends of the rails 5 and 5; those of each pair being mounted rotatably on bolts 16 from which, between paired wheels, are

suspended carrying hooks 17, wherefrom the- The preferred type of trolley is illustrated in Figures]. and 2. I This comprises a frame Formed on the upperiand lower walls the channels 12 are longitudinally extending beadsand 26 along which the sheave rollers may follow and which willprevent the latter from being displaced from proper position within'the guideways.

The arms20 of the Wheels 15 are of such jnumber that there will be two or more of each wheel at all times connected with the vrails'5- -5, and they are of such length that, as'thedevice moves along the cable, the arms will receive the cross bars 2 therebetween and will carry the hooks past any interference.

In Figure 3 I have illustrated an alter-- native construction whichfemploys but one pair of stepping wheels and two arcuate "guide railsj12 which are supported by rollers f 30 at their ends. This device operates asthat is intended for previously described but lighter Work. v

Assuming that the device is so 'constructed "and mountedon' a cable orrail'suppo t d upon: transverse a s or cables, it will'be seen that'as the trolley moves along the cable thecross bar swill enter betw een the arms of the forward wheel and will revolve the wheel in its support, so that the Wheel passes across the bar without being disconnected from the carrying frame. p Having thus described my invent on, what I claim as new thereinand desireto secure by LettersPatenn isz" The combination with a cable provided with transverse supporting bars,'of a trolley adapted for travel along said cable comprising paired, longitudinally extending frame rails, sheave wheels mounted between saidrails at their ends for travel alongsaid cable, said rails-being provided'at theirfopposite end with inwardly facing, ar'cuate channels formed about centerssubstantially opposite ends, each wheel comprising-a plu "ralityof radial, arms provided with sheave 5O "below the cable and opening attheir ends in r; the i direction of the: cable, paired, stepping wheels'mounted between-said rails; atthei'r,

rollers at their ends" arranged circularly on the same radii as said arcuate channels and adapted to move thereln and to suspend said wheelsthereby below said cable; said arms being of such length and spaced toreceive the cross bars between the same as the trolley-1= i a 1 moves thereover; and whangers' suspended from between. paired Wheels "where from loads may be suspended andcarried along said cable. 1 v

- Signed at Seattle, Washington', vthis28th day of February 1921.'

I MELVEN G WILSON. 

